Improvement in bung-bush wrenches



l. B. SMITH.

Bung-Bush Wrenches.

No.\48,629. PatentedMarch17,1a74,

wine/gef @W6/)2272? UNITED STATES PATENT OFFICE..

JOHN B. SMITH, OF MILVAUKEE, WISCONSIN.

IMPROVEMENT IN BUNG-BUSH WRENCHES.

Specification forming part of Letters Patent No. 148,629, dated March17, 1574 application h d May 8, 1873.

To all whom t may concern:

Be it known that I, JOHN B. SMITH, of Milwaukee, in the county ofMilwaukee, in the State of Wisconsin, have invented certain Improvementsin Wrenches, of which the following' is a specification:

Myinvention is an improvement in a wrench for screwing bung-bushes intobarrels, and is a double cam secured to ahandle,which,when the camis-inserted in the bush and the handle turned, is spread out, and thecorrugations on the outside of the cams press against the inside of thebush, and as the handle is turned screws it into the barrel.

Figure l is a lat View of the wrench, and Fig. 2 is a sectional View.

A is the handle of the wrench; B B, the cams; C, a bar or plate acrossthe cams, and on the screw-bolts on which they move; D D, bolts andnuts. The bolts pass through the cams into the handle, and the lbar orplate is placed on them to keep them the right distance apart, and acouple of nuts are screwed onto the top of the bolts in the top of thecams Bv B; E, a bung-bush to be screwed into a barrel.

The operation of this wrench is as follows: The cams are placed insidelof a bush, and as the handle A is turned the corrugations or teethcatch on the inside of the bush, and the harder the handle is turned thermer they hold, and the bush is screwed into the hole

